Patent Assignment
Reel/Frame 004902/0220
Assignment of Assignors Interest.
Recorded: 1988-06-10
Pages: 2
Assignor
PIGGIN, RICHARD H.
Executed: 1988-06-02
Assignee
GEARHART INDUSTRIES, INC., A CORP. OF TEXAS
1100 EVERMAN ROAD, FORT WORTH, TEXAS, 76140
Covered Property
(1)
Method and Apparatus for Seismic Exploration of Strata Surrounding a Borehole
Patent:
4,873,675 →
Application:
07/205,291 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Jun 10, 1988
From: BARR, FREDERICK J. JR.
To: GEARHART INDUSTRIES, INC., A CORP. OF TEXAS
Reel/Frame 004902/0222 →
Assignment of Assignors Interest.
Jun 10, 1988
From: BEASLEY, THOMAS R.
To: GEARHART INDUSTRIES, INC., A CORP. OF TEXAS
Reel/Frame 004902/0224 →
Change of Name Effective January 1, 1989
Mar 28, 1989
From: GEARHART INDUSTRIES, INC.
To: HALLIBURTON LOGGING SERVICES, INC.
Reel/Frame 005046/0612 →
Assignment of Assignor's Interest
Jul 18, 2000
From: DAILEY INTERNATIONAL, INC.
To: WEATHERFORD U.S. L.P.
Reel/Frame 010977/0150 →